Carl Petersen

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Cortical Control of Whisker Movement

Carl Petersen

Facial muscles drive whisker movements, which are important for active tactile sensory perception in mice and rats. These whisker muscles are innervated by cholinergic motor neurons located in the lateral facial nucleus. The whisker motor neurons receive s ...

Annual Reviews2014

Barrel cortex function

Carl Petersen, James Poulet

Neocortex, the neuronal structure at the base of the remarkable cognitive skills of mammals, is a layered sheet of neuronal tissue composed of juxtaposed and interconnected columns. A cortical column is considered the basic module of cortical processing pr ...

Pergamon-Elsevier Science Ltd2013

Membrane Potential Dynamics of Neocortical Projection Neurons Driving Target-Specific Signals

Carl Petersen, Yves Emile Alfred Kremer, Aurélie Pala, Takayuki Yamashita, Egbert Welker, Leticia Pedrido

Primary sensory cortex discriminates incoming sensory information and generates multiple processing streams toward other cortical areas. However, the underlying cellular mechanisms remain unknown. Here, by making whole-cell recordings in primary somatosens ...

Cell Press2013

Synaptic Computation and Sensory Processing in Neocortical Layer 2/3

Carl Petersen, Sylvain Crochet

Computations in neocortical circuits are predominantly driven by synaptic integration of excitatory glutamatergic and inhibitory GABAergic inputs. New optical, electrophysiological, and genetic methods allow detailed in vivo investigation of the superficia ...

Cell Press2013

Membrane potential correlates of sensory perception in mouse barrel cortex

Carl Petersen, Yves Emile Alfred Kremer, Shankar Sachidhanandam, Varun Sreenivasan, Alexandros Kyriakatos

Neocortical activity can evoke sensory percepts, but the cellular mechanisms remain poorly understood. We trained mice to detect single brief whisker stimuli and report perceived stimuli by licking to obtain a reward. Pharmacological inactivation and optog ...

Nature Publishing Group2013

Parameter extraction and classification of three cortical neuron types reveals two distinct adaptation mechanisms

Wulfram Gerstner, Carl Petersen, Richard Naud, Skander Mensi, Christian Antonio Pozzorini, Michael Avermann

Mensi S, Naud R, Pozzorini C, Avermann M, Petersen CCH, Gerstner W. Parameter extraction and classification of three cortical neuron types reveals two distinct adaptation mechanisms. J Neurophysiol 107: 1756-1775, 2012. First published December 7, 2011; do ...

American Physiological Society2012

Thalamic control of cortical states

Carl Petersen, Sylvain Crochet, James Poulet

We investigated the impact of thalamus on ongoing cortical activity in the awake, behaving mouse. We demonstrate that the desynchronized cortical state during active behavior is driven by a centrally generated increase in thalamic action potential firing, ...

Nature Publishing Group2012

Microcircuits of excitatory and inhibitory neurons in layer 2/3 of mouse barrel cortex

Wulfram Gerstner, Carl Petersen, Céline Matéo, Michael Avermann, Christian Tomm

Avermann M, Tomm C, Mateo C, Gerstner W, Petersen CC. Microcircuits of excitatory and inhibitory neurons in layer 2/3 of mouse barrel cortex. J Neurophysiol 107: 3116-3134, 2012. First published March 7, 2012; doi:10.1152/jn.00917.2011.-Synaptic interactio ...

American Physiological Society2012

Unique functional properties of somatostatin-expressing GABAergic neurons in mouse barrel cortex

Carl Petersen, Yves Emile Alfred Kremer

Neocortical GABAergic neurons have diverse molecular, structural and electrophysiological features, but the functional correlates of this diversity are largely unknown. We found unique membrane potential dynamics of somatostatin-expressing (SOM) neurons in ...

Nature Publishing Group2012

Synaptic Mechanisms Underlying Sparse Coding of Active Touch

Carl Petersen, Sylvain Crochet, Yves Emile Alfred Kremer, James Poulet

Sensory information is actively gathered by animals, but the synaptic mechanisms driving neuronal circuit function during active sensory processing are poorly understood. Here, we investigated the synaptically driven membrane potential dynamics during acti ...

2011

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